Copyright for mctc-lib source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Source: https://github.com/grimme-lab/mctc-lib
Upstream-Name: mctc-lib
Upstream-Contact: https://github.com/grimme-lab/mctc-lib/issues

Files: *
Copyright: 2020-2021, Sebastian Ehlert
License: Apache-2.0

Files: debian/*
Copyright: 2022, Andrius Merkys 
License: Apache-2.0

License: Apache-2.0
 On Debian systems, the full text of the Apache-2.0 license
 can be found in the file '/usr/share/common-licenses/Apache-2.0'